APA (7th ed.) Zitazioa
Edgar, P. B. (2011). Rational gridlock. University Press of America, Inc..
Chicago Style (17th ed.) Zitazioa
Edgar, Patrick B. Rational Gridlock. Lanham, Maryland ; Plymouth, England: University Press of America, Inc., 2011.
MLA (9th ed.) Zitazioa
Edgar, Patrick B. Rational Gridlock. University Press of America, Inc., 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.